According to the official SAP Emarsys Customer Engagement documentation, the Dynamic Layout of a ShoutOut within its editor is architecturally composed of three primary layers. These are the Frame, which acts as the outermost container for the ShoutOut; the Canvas, which is the design surface within the Frame where content is arranged; and the Widget, which represents the individual content elements (like text, images, or buttons) that are placed onto the Canvas. This layered structure facilitates the creation of dynamic and responsive on-site messages.

C. Z-index: This is a CSS property used to control the stacking order of elements, not a fundamental structural layer of the ShoutOut editor itself.

E. Player: This term is not a defined layer in the ShoutOut's dynamic layout. It might refer to a component within a widget (e.g., a video player), but not a core layer.

SAP Help Portal: "ShoutOuts - The Dynamic Layout". This document explicitly states

"The Dynamic Layout of a ShoutOut in the Editor consists of three layers: Frame

Canvas

and Widget."

URL: https://help.sap.com/docs/SAPEMARSYSCUSTOMERENGAGEMENT/b4c1369d4b3c4164833843ee4a9f132b/1808811860181306e10000000a4450e5.html